IS200EDEXG1BBB

Overview

The IS200EDEXG1BBB is a GE Exciter De-Excitation Control Board for EX2100e excitation systems, designed to protect generator systems during emergency shutdowns.

Operating Parameters

• Operating Temperature: –30 to 65 °C

• Input Filter: Hardware, 4 ms

• Excitation Voltage: 24 V DC nominal

Key Functions

• SCR Firing: Controls Silicon Controlled Rectifiers for energy dissipation

• Conduction Sense Feedback: Monitors conduction status during de-excitation

• Voltage Retention: Maintains voltage in case of power loss

Control & Integration

• Initiation: Managed by EMIO board via EXTB

• Breaker/Contactor Operation: Opens 41 DC contactor (MDA/MDB)

• Signal Relay: Auxiliary contacts send signals to SCR firing circuits

Board Types

• Group 1: SCR de-excitation for controlled energy dissipation

• Group 2: Diode de-excitation for diode-based energy control

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